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Si12-994

Removal of PCBs (Pattern 1)

Removal Procedure

13

5

Remove the drip proof
plate.

6

Disconnect the
connectors [S52]
[S102] from the service
monitor PCB.

7

The figure shows the
service monitor PCB.

8

Release the 2 hooks to
remove the service
monitor PCB.

Step

Procedure

Points

(R6577)

Drip proof plate

(R6578)

[S102]

[S52]

Service
monitor PCB

Priority room setting switch
(SW4)
Wiring error check switch
(SW3)
Forced operation ON / OFF
switch (SW1)
NIGHT QUIET mode setting
switch (SW5)

Operation mode switch
(SW2)

LED A

LED 1

LED 2
LED 3

LED 4

(R3064)

(R6579)

Hook

Hook

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Содержание 3MXS80EV2C

Страница 1: ...REMOVAL PROCEDURE S E R V I C E M A N U A L 7 1 8 0 kW Class 18000 Btu h Class Outdoor Unit Inverter Multi Type Si12 994 ...

Страница 2: ...Service Manual Removal Procedure Outdoor Unit zHeat Pump 2MXS18GVJU 3MXS80EV2C PMXS3GV2C ...

Страница 3: ...attern 2 7 4 Removal of PCBs Pattern 1 12 5 Removal of PCBs Pattern 2 16 6 Removal of Fan Motor 19 7 Removal of Sound Blankets 20 8 Removal of Coils Thermistors 22 9 Removal of Four Way Valve Defrost Solenoid Valve 24 10 Removal of Distributor 26 11 Removal of Compressor 27 Note The illustrations may be slightly different depending on the model ...

Страница 4: ...ter turning off all power supplies before disassembling work Step Procedure Points 1 External appearance 2 Remove the 4 screws of the top panel and the 6 screws of the front panel 3 Remove the 4 screws of the discharge grille 4 Remove the 2 screws of the piping cover R2159 Top panel Discharge grille Front panel R10351 R10352 Piping cover ...

Страница 5: ...s 2 Remove the terminal board fixing screw Match the colors of the connection wires to A B and C ports as follows 1 Black Power supply 2 White Power supply 3 Red Transmission The wires are fixed to the terminal board with screws Electrical box Electronic expansion valve coils Service monitor PCB A port B port C port Service port R3063 Outdoor temperature thermistor Liquid pipe Gas pipe R2163 Termi...

Страница 6: ... way valve coil S80 3 Disconnect the connectors for the thermistors S90 S92 S93 and the connector for the overload protector S40 S40 Overload protector S90 Thermistor outdoor temperature outdoor heat exchanger discharge pipe S92 Gas pipe thermistor S93 Liquid pipe thermistor 4 Disconnect the relay connector of the compressor Step Procedure Points S20 S21 S22 R16025 R11729 S80 S40 R2168 S90 S92 S93...

Страница 7: ...reactor lead wires 3 Remove the wire fixing plate 1 Remove the 2 screws of the wire fixing plate 4 Remove the electrical box 1 Remove the screw of the electrical box 2 Remove the screw of the electrical box Step Procedure Points Reactor R2170 R11309 Wire fixing plate R2172 R2173 ...

Страница 8: ...994 6 Removal Procedure 3 Remove the drip proof cover 4 Disconnect the connector for the fan motor S70 from the inverter PCB 5 Lift up the electrical box and dismount it Step Procedure Points Drip proof cover R2174 Inverter PCB S70 R2175 R2176 ...

Страница 9: ...s 2 Remove all the screws of the connecting wires and the power supply wires 3 Remove the screw of the earth ground wire 2 Remove the harnesses S20 White S21 Red Bundle the harnesses of the electronic expansion valve coil with clamp Pull out the clamp When reassembling insert the clamp into one of the holes 1 Disconnect the 2 connectors for the electronic expansion valve coil S20 S21 Liquid room A...

Страница 10: ...rature outdoor heat exchanger discharge pipe S92 gas pipe thermistors S93 liquid pipe thermistors Pull out the clamp When reassembling insert each clamp of the thermistors into one of the holes as below When reassembling insert each clamp into the holes When reassembling the thermistor harness should be placed between the electrical box and the reactor harness as below Step Procedure Points R17398...

Страница 11: ... of Electrical Box Pattern 2 Removal Procedure 9 4 Disconnect the relay connector of the compressor 5 Release the clamp with pliers 6 Disconnect the reactor lead wires Step Procedure Points R17065 R17066 R2170 Reactor ...

Страница 12: ...rical box 1 Remove the screw of the shield plate 2 Unfasten the 2 hooks and remove the shield plate 3 Remove the screw on the right side of the electrical box 4 Remove the screw on the front side of the electrical box Step Procedure Points R17345 Shield plate R17346 Hook R10361 R17402 ...

Страница 13: ... 11 5 Remove the drip proof cover 6 Disconnect the connector for the fan motor S70 from the inverter PCB MID2 Release the fan motor lead wire from the hooks 7 Remove the electrical box Step Procedure Points R2174 Drip proof cover Inverter PCB MID2 S70 R2175 R2176 ...

Страница 14: ...tep Procedure Points 1 Remove the service monitor PCB and the main PCB 1 Remove the screw of the main PCB and release the 2 hooks 2 Remove the screw and release the hook of the terminal board and open the terminal board 3 Disconnect each connector on the back of the terminal board 4 Detach the fixing tape for the drip proof plate Main PCB Base bar R2177 R11731 Terminal board Hook R6575 R6576 Fixin...

Страница 15: ... the service monitor PCB 8 Release the 2 hooks to remove the service monitor PCB Step Procedure Points R6577 Drip proof plate R6578 S102 S52 Service monitor PCB Priority room setting switch SW4 Wiring error check switch SW3 Forced operation ON OFF switch SW1 NIGHT QUIET mode setting switch SW5 Operation mode switch SW2 LED A LED 1 LED 2 LED 3 LED 4 R3064 R6579 Hook Hook ...

Страница 16: ...Si12 994 14 Removal Procedure 9 Remove the service monitor PCB 10 Lift up the main PCB 11 Disconnect the connectors S31 S32 S33 S71 H1 H2 Step Procedure Points R6580 Main PCB R2181 S31 S71 S33 R10362 H1 yellow S32 H2 blue R10363 ...

Страница 17: ...the connector E 13 The figure shows the main PCB 2 Remove the inverter PCB MID2 1 Remove the 7 screws to remove the inverter PCB MID2 Step Procedure Points E green yellow R2184 H1 H2 S22 S80 S21 S20 S40 R11310 S31 S33 S32 S90 S92 S93 FU2 S71 Fuse 3 15A Inverter PCB R10355 ...

Страница 18: ...or PCB and the main PCB When reassembling insert the base bar into the hole of the main PCB 1 Remove the screw of the main PCB and unfasten the 2 hooks 2 Unfasten the hook of the terminal board and open the terminal board 3 Disconnect each connector S11 HE HL HN on the back of the terminal board 4 Disconnect the connectors S52 S102 from the service monitor PCB Main PCB R2177 Base bar R2178 Hook S1...

Страница 19: ...e 17 5 Lift up the main PCB 6 Disconnect the connectors S31 S32 S33 S71 H1 H2 7 The figure shows the main PCB Step Procedure Points R2181 S31 S71 S33 R10362 H1 yellow S32 H2 blue R10363 S80 S21 S20 S40 S31 S71 S33 S32 H2 H1 FU2 3 15A S90 S92 S93 R10356 ...

Страница 20: ...ter PCB MID2 1 Remove the 7 screws and remove the inverter PCB MID2 Step Procedure Points Priority room setting switch SW4 Wiring error check switch SW3 Forced operation ON OFF switch SW1 NIGHT QUIET mode setting switch SW5 Operation mode switch SW2 Hook Hook R17348 LED A LED 1 LED 2 LED 3 LED 4 FU201 3 15A Inverter PCB MID2 R10355 ...

Страница 21: ... the connector for the fan motor Nut size M6 When reassembling align the mark of the outdoor fan with the D cut section of the motor shaft When reassembling fix the fan motor lead wire to the clamps to avoid contact with the outdoor fan 2 Remove the 2 screws of the fan motor mount 3 Disconnect the fan motor lead wire by releasing the 2 clamps fixing the wire Remove the 4 screws to remove the fan m...

Страница 22: ...to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 5 screws of the right side panel 2 Release the clamp with pliers 3 Remove the 2 screws of the partition plate and remove the plate Right side panel R2191 R16508 Partition plate R11311 ...

Страница 23: ...1 4 Remove the sound blanket top upper top inner outer inner Step Procedure Points Sound blanket top upper Sound blanket top inner Sound blanket inner Sound blanket outer Carefully remove the sound blanket which is easily torn in the piping section R11691 ...

Страница 24: ...and remove the defrost solenoid valve coil Only for the U S model 3 Remove the electronic expansion valve coil for each room 4 Release the fixture and remove the discharge pipe thermistor Place the thermistor so that its end comes up to the end of the fixture Be careful not to lose the fixture for the discharge pipe thermistor Four way valve coil R2194 Defrost solenoid valve coil R2195 Electronic ...

Страница 25: ...e the clip or fixtures for the liquid and gas pipe thermistor 6 Remove the wire harness S90 Outdoor temperature thermistor Blue Outdoor heat exchanger thermistor Gray Discharge pipe thermistor Black S92 Gas pipe thermistor Room A Black Room B Gray Room C Brown S93 Liquid pipe thermistor Room A Black Room B Gray Room C Yellow Step Procedure Points R2198 Gas pipe thermistor Liquid pipe thermistor R2...

Страница 26: ... Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect the b...

Страница 27: ... solenoid valve is only for the U S models Note Do not use a metal saw for cutting pipes by all means because the sawdust comes into the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Step Procedure Points f e R12395 ...

Страница 28: ...gas Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect th...

Страница 29: ...es or more after turning off all power supplies before disassembling work Step Procedure Points 1 2 Remove the terminal cover Disconnect the compressor lead wires 3 Remove the 2 sheets of putty 4 Remove the 3 nuts Terminal cover Compressor lead wire V yellow W blue U red N brown Terminal nameplate R16026 R2205 Putty R10373 ...

Страница 30: ...ation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 120 C For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore 2 Cut p...

Страница 31: ...Revision History Month Year Version Revised contents 02 2013 Si12 994 First edition ...

Страница 32: ...ries supplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion z Read the User s Manual carefully before using this product The User s Manual provides important safety instructi...

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